@mixin wh($w, $h) {
  width: $w;
  height: $h;
}

@mixin margin-tl($t, $l) {
  margin-top: $t;
  margin-left: $l;
}

@mixin margin-tb($t, $b) {
  margin-top: $t;
  margin-bottom: $b;
}

@mixin padding-lr($l, $r) {
  padding-left: $l;
  padding-right: $r;
}
